Governance-approved, permissionless fault proofs are live on OP Mainnet, and with them the OP Stack arrives at Stage 1. This is a monumental milestone for the Superchain, and soon more OP Stack Chains will upgrade to include this functionality, starting with Base, Metal, Mode, and Zora.| optimism.mirror.xyz
Feature-complete fault proofs are live on OP Sepolia! This milestone testnet release lays the foundation for a "multi-proof nirvana" and Stage 2 Superchain.| OP Labs Blog